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Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Solving Quadratic Equations by Finding Square Roots

For Students 9th - 10th Standards
Thirteen problems present a variety of practice solving quadratic equations by finding square roots. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the...
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Unknown Type
Khan Academy

Khan Academy: Solve Quadratic Equations: Complex Solutions

For Students 9th - 10th Standards
Solve quadratic equations using the quadratic formula. Some of the equations have real solutions while others have complex solutions.
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Unit Plan
Khan Academy

Khan Academy: Solve Quadratic Equations Complex Solutions

For Students 9th - 10th Standards
Solve quadratic equations using the quadratic formula. Some of the equations have real solutions while others have complex solutions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
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Handout
University of St. Andrews (UK)

University of St. Andrews: Quadratic Equations History

For Students 9th - 10th
This site from the University of St. Andrews provides an extensive history of quadratic, cubic, and quartic equations including various historical figures and their contributions to modern methods of solving quadratics.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Use Graphs to Solve Quadratic Equations

For Students 8th - 9th
[Free Registration/Login may be required to access all resource tools.] Learn how to use graphs to solve quadratic equations.
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Unit Plan
CK-12 Foundation

Ck 12: Analysis: Quadratic Inequalities

For Students 11th - 12th
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn about graphing and solving quadratic inequalities. Students examine guided notes, review guided practice, watch instructional videos...
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Activity
Help Algebra

Help algebra.com: Quadratic Equations

For Students 9th - 10th Standards
This article gives a definition of quadratic equations, then demonstrates how to solve them. Factoring, completing the square and the quadratic formula are the methods described. The examples are accompanied by lists of steps for solving...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Rei: Braking Distance

For Teachers 9th - 10th
The purpose of this task is to give an application arising from a real-world situation, determining braking distance, in which a quadratic equation arises. In this scenario, it is natural to use a graphical method to find an approximate...
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Unit Plan
Stefan Warner and Steven R. Costenoble

Finite Mathematics & Applied Calculus: Polynomial Equations

For Students 9th - 10th
The tutorial investigates how to solve polynomial equations. Students learn about the concept through class notes, examples, and practice problems. Topics include solving quadratic equations, factoring, and the quadratic formula.
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Handout
CK-12 Foundation

Ck 12: Algebra: Graphing Quadratic Equations Study Guide

For Students 9th - 10th
This comprehensive study guide highlights the main terms and formulas needed to review graphing quadratic equations. Examples are included.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Bf Building a Quadratic Function From F(x) = X^2

For Teachers 9th - 10th Standards
This is the first of a series of tasks aiming at understanding the quadratic formula in a geometric way in terms of the graph of a quadratic function. Here the student works with an explicit function and studies the impact of additive...
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Graphic
Curated OER

Quadratic Formula

For Students 9th - 10th
Sample quadratic formula
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Handout
Purple Math

Purplemath: Complex Numbers: Introduction

For Students 9th - 10th Standards
This website provides an in-depth lesson on complex numbers. You learn about simplifying, adding, and multiplying complex numbers by viewing example problems that are worked through step-by-step. Continue on to pages 2 and 3 which...

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